https://llvm.org/bugs/show_bug.cgi?id=28284
Bug ID: 28284
Summary: Clang crashes when creating a this expression during
template instantiation
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: rtr...@google.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
template <typename T>
struct Foo {
void (*function)() = [this]() -> void { auto x = s1.s2.ptr; };
struct S1 {
struct S2 {
int* ptr;
};
S2 s2;
};
S1 s1;
};
void run() { new Foo<int>(); }
>From lib/Sema/TreeTransform.h:
template<typename Derived>
ExprResult
TreeTransform<Derived>::TransformCXXThisExpr(CXXThisExpr *E) {
QualType T = getSema().getCurrentThisType();
if (!getDerived().AlwaysRebuild() && T == E->getType()) {
// Make sure that we capture 'this'.
getSema().CheckCXXThisCapture(E->getLocStart());
return E;
}
return getDerived().RebuildCXXThisExpr(E->getLocStart(), T, E->isImplicit());
}
In TransformCXXThisExpr, getSema().getCurrentType() returns a empty QualType.
This is passed to function RebuildCXXThisExpr, which expects the QualType to be
a valid Type.
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